<!DOCTYPE HTML>
<html lang="en" xmlns="http://www.w3.org/1999/html">
<head>
  <meta charset="utf-8">
  <title>登陆界面</title>
</head>
<body>
  <form method="post" action="/login_submit/">
    账号：<input ytpe='text' name='username'></br>
    密码：<input type="password" name="password"></br>
    <input type='submit' value='登录'>
  </form>
</body>

</html>